Antenna



FIG. 1 is a top perspective view of a first embodiment of an antenna, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a side elevation view thereof;

FIG. 5 is a top perspective view of a second embodiment of an antenna, showing our new design;

FIG. 6 is a top plan view thereof;

FIG. 7 is a front elevation view thereof; and,

FIG. 8 is a side elevation view thereof. 

CLAIM The ornamental design for an antenna, as shown and described. 